When the flare lights up the night sky, that is how they know the gasoline is ready for sale, the men on the motorbikes who collect the canisters from the fearless Chitara, her sister Léa and their all-female gang, the sample fuel still burning out on the ground. From the watchtower of their makeshift oil refinery, you can see the lights of Brasília in the distance, although Sol Nascente, one of the continent’s biggest favelas, is a world unto itself, a real setting still ineluctably cinematic.